1521550066157 has 16 divisors (see below), whose sum is σ = 1712178585600. Its totient is φ = 1339965685440.

The previous prime is 1521550066109. The next prime is 1521550066163. The reversal of 1521550066157 is 7516600551251.

It is a cyclic number.

It is not a de Polignac number, because 1521550066157 - 2³⁶ = 1452830589421 is a prime.

It is a super-2 number, since 2×1521550066157² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521550066187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8069357 + ... + 8255762.

It is an arithmetic number, because the mean of its divisors is an integer number (107011161600).

Almost surely, 2^{1521550066157} is an apocalyptic number.

It is an amenable number.

1521550066157 is a deficient number, since it is larger than the sum of its proper divisors (190628519443).

1521550066157 is a wasteful number, since it uses less digits than its factorization.

1521550066157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16325396.

The product of its (nonzero) digits is 315000, while the sum is 44.

The spelling of 1521550066157 in words is "one trillion, five hundred twenty-one billion, five hundred fifty million, sixty-six thousand, one hundred fifty-seven".